Coal slurry preparation device

Abstract

The utility model relates to the technical field of coal slurry preparation, in particular to a coal slurry preparation device, and solves the technical problems that in the prior art, once a low-pressure coal slurry pump in a coal grinding system breaks down in the operation period, the coal grinding system can only be stopped and is forced to be overhauled, the coal slurry preparation work is stopped in the overhauling process, and the coal slurry preparation efficiency is influenced. According to the technical scheme, a standby pump is arranged, so that equipment can continue to operate in the process of overhauling a low-pressure coal slurry pump; the on-line running time of the coal milling system is prolonged, the bottleneck that the coal milling system is shut down due to equipment faults is broken through, and long-period stable running of a production device is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of coal slurry preparation, in particular to a coal slurry preparation device. Background Art

[0002] Normally, two coal grinding systems are in operation and one is in standby. The process flow is that one coal mill corresponds to one small coal slurry tank and one low-pressure coal slurry pump; once the low-pressure coal slurry pump in the coal grinding system fails during operation, the whole coal grinding system has to stop for forced maintenance; during the maintenance process, the coal slurry preparation work stops, affecting the coal slurry preparation efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the technical problem that once the low-pressure coal slurry pump in the coal grinding system fails during operation, the whole coal grinding system has to stop for forced maintenance; during the maintenance process, the coal slurry preparation work stops, affecting the coal slurry preparation efficiency in the prior art.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: a coal slurry preparation device, comprising: a small coal slurry tank, the small coal slurry tank is connected to the inlet of the low-pressure coal slurry pump, and the outlet of the low-pressure coal slurry pump is connected to the large coal slurry tank; the bottom of the small coal slurry tank is connected to the inlet of the standby pump, and the outlet of the standby pump is connected to the connection line between the low-pressure coal slurry pump and the large coal slurry tank; the standby pump is used when the low-pressure coal slurry pump is shut down for maintenance.

[0005] Preferably, the standby pump is a centrifugal low-pressure coal slurry pump.

[0006] Preferably, there are two small coal slurry tanks, each small coal slurry tank is connected with a low-pressure coal slurry pump, and the outlets of the low-pressure coal slurry pumps are evenly connected to the large coal slurry tank; the bottom of each small coal slurry tank is connected to the inlet of the standby pump, and the outlet of the standby pump is connected to the connection line between the low-pressure coal slurry pump and the large coal slurry tank.

[0007] Preferably, coal slurry discharge valves are arranged between the small coal slurry tank and the low-pressure coal slurry pump and the standby pump respectively.

[0008] Preferably, a manual valve is arranged between the low-pressure coal slurry pump and the large coal slurry tank.

[0009] Preferably, the connection point between the outlet of the standby pump and the connection line between the low-pressure coal slurry pump and the large coal slurry tank is behind the manual valve.

[0010] Preferably, an outlet valve is arranged between the connection line of the low-pressure coal slurry pump and the large coal slurry tank and the outlet of the standby pump.

[0011] Preferably, between the small coal slurry tank and the low-pressure coal slurry pump, between the low-pressure coal slurry pump and the large coal slurry tank, between the small coal slurry tank and the standby pump, and between the connection routes of the low-pressure coal slurry pump and the large coal slurry tank and the standby pump are all connected by pipelines.

[0012] Preferably, flanges are provided at both the outlet and inlet of the standby pump. An elbow is provided between the inlet of the standby pump and the small coal slurry tank. The inlet of the standby pump is connected to the elbow, and the elbow is connected to the small coal slurry tank through a pipeline. Flanges are provided at the connection points of the elbow with the standby pump and the pipeline; a handle can be provided on the elbow for easy disassembly of the elbow.

[0013] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0014] 1. In the present utility model, by providing a standby pump, during the maintenance process of the low-pressure coal slurry pump, the equipment can continue to operate, improving the online operation time of the coal grinding system, breaking through the bottleneck of the coal grinding system shutdown caused by the failure of the rotating equipment, and ensuring the long-term stable operation of the production device. Description of the Drawings

[0015] Figure 1 is the overall structural schematic diagram of the coal slurry preparation equipment provided by the present utility model;

[0016] Figure 2 is the present utility model Figure 1 Schematic diagram of the structure at point A.

[0017] Legend Explanation:

[0018] 1. Coal slurry discharge valve; 2. Small coal slurry tank; 3. Low-pressure coal slurry pump; 4. Standby pump; 5. Hand valve; 6. Outlet valve; 7. Flange; 8. Handle; 9. Large coal slurry tank. Detailed Embodiments

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0020] Embodiment 1:

[0021] A coal slurry preparation device provided in this embodiment includes: a small coal slurry tank 2, the small coal slurry tank 2 is connected to the inlet of a low-pressure coal slurry pump 3, and the outlet of the low-pressure coal slurry pump 3 is connected to a large coal slurry tank 9; the bottom of the small coal slurry tank 2 is connected to the inlet of a standby pump 4, and the outlet of the standby pump 4 is connected to the connection line between the low-pressure coal slurry pump 3 and the large coal slurry tank 9; the standby pump 4 is used when the low-pressure coal slurry pump 3 is shut down for maintenance. In this embodiment, the standby pump 4 is a centrifugal low-pressure coal slurry pump 3.

[0022] The pulverized coal is input into the small coal slurry tank 2 by a coal mill, and the coal slurry in the small coal slurry tank 2 is then input into the large coal slurry tank 9 by the low-pressure coal slurry pump 3. When the low-pressure coal slurry pump 3 has problems and needs to be repaired, the standby pump 4 is started, and the coal slurry transfer between the small coal slurry tank 2 and the large coal slurry tank 9 is realized through the standby pump 4. During the process of repairing the low-pressure coal slurry pump 3, the equipment can continue to operate, the online operation time of the coal grinding system is increased, the bottleneck of the coal grinding system shutdown caused by the failure of the rotating equipment is broken through, and the long-term stable operation of the production device is ensured.

[0023] Embodiment 2:

[0024] Different from the above embodiment, in this embodiment, there are two small coal slurry tanks 2, and a low-pressure coal slurry pump 3 is connected to each small coal slurry tank 2. The outlets of the low-pressure coal slurry pumps 3 are evenly connected to the large coal slurry tank 9; the bottom of each small coal slurry tank 2 is connected to the inlet of the standby pump 4, and the outlet of the standby pump 4 is connected to the connection line between the low-pressure coal slurry pump 3 and the large coal slurry tank 9; a coal slurry discharge valve 1 is provided between the small coal slurry tank 2 and the low-pressure coal slurry pump 3 and the standby pump 4; a manual valve 5 is provided between the low-pressure coal slurry pump 3 and the large coal slurry tank 9; the connection between the outlet of the standby pump 4 and the connection line between the low-pressure coal slurry pump 3 and the large coal slurry tank 9 is located behind the manual valve 5; an outlet valve 6 is provided between the connection line of the low-pressure coal slurry pump 3 and the large coal slurry tank 9 and the outlet of the standby pump 4; the connection line between the low-pressure coal slurry pump 3 and the large coal slurry tank 9, between the small coal slurry tank 2 and the standby pump 4, and between the connection line of the low-pressure coal slurry pump 3 and the large coal slurry tank 9 and the standby pump 4 are all connected by pipelines.

[0025] When the low-pressure coal slurry pumps 3 connected to the two small coal slurry tanks 2 need to be repaired, the standby pump 4 can be opened to keep the equipment running normally. The discharge valve can control the on-off between the small coal slurry tank 2 and the low-pressure coal slurry pump 3 and the standby pump 4; the manual valve 5 can control the on-off between the low-pressure coal slurry pump 3 and the large coal slurry tank 9; the outlet valve 6 can control the on-off between the standby pump 4 and the connecting pipeline between the low-pressure coal slurry pump 3 and the large coal slurry tank 9; thus ensuring the normal operation of the equipment after switching and the smooth repair of the low-pressure coal slurry pump 3.

[0026] In this embodiment, flanges 7 are provided at both the outlet and the inlet of the standby pump 4. An elbow is provided between the inlet of the standby pump 4 and the small coal slurry. The inlet of the standby pump 4 is connected to the elbow. The elbow is connected to the small coal slurry tank 2 through a pipeline. Flanges 7 are provided at the connections of the elbow with the standby pump 4 and the pipeline. The handle 8 facilitates the disassembly of the elbow.

[0027] The elbow connected by the flange 7 can be disassembled. By using an elbow that only connects to a single small coal slurry tank 2 or a Y-shaped elbow that connects to the small coal slurry tanks on both sides, it is possible to connect the single-sided small coal slurry tank 2 to the standby pump 4 or connect the double-sided small coal slurry tanks to the standby pump 4 according to requirements, realizing mutual hot standby between devices.

[0028] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A coal slurry preparation device, characterized in that: include: A small coal slurry tank (2), wherein the small coal slurry tank (2) is connected to the inlet of a low-pressure coal slurry pump (3), and the outlet of the low-pressure coal slurry pump (3) is connected to a large coal slurry tank (9); the bottom of the small coal slurry tank (2) is connected to the inlet of a standby pump (4), and the outlet of the standby pump (4) is connected to the connection route between the low-pressure coal slurry pump (3) and the large coal slurry tank (9); the standby pump (4) is used when the low-pressure coal slurry pump (3) is shut down for maintenance.

2. The coal slurry preparation device according to claim 1, characterized in that: The standby pump (4) is a centrifugal low-pressure coal slurry pump (3).

3. The coal slurry preparation device according to claim 1, characterized in that: There are two small coal slurry tanks (2), each of which is connected to a low-pressure coal slurry pump (3), and the outlet of the low-pressure coal slurry pump (3) is evenly connected to the large coal slurry tank (9); the bottom of each small coal slurry tank (2) is connected to the inlet of a standby pump (4), and the outlet of the standby pump (4) is connected to the connection route between the low-pressure coal slurry pump (3) and the large coal slurry tank (9).

4. The coal slurry preparation device according to claim 3, characterized in that: A coal slurry discharge valve (1) is provided between the small coal slurry tank (2), the low-pressure coal slurry pump (3) and the standby pump (4).

5. The coal slurry preparation device according to claim 3, characterized in that: A hand valve (5) is provided between the low-pressure coal slurry pump (3) and the large coal slurry tank (9).

6. The coal slurry preparation device according to claim 5, characterized in that: The connection point between the outlet of the standby pump (4) and the connection route between the low-pressure coal slurry pump (3) and the large coal slurry tank (9) is located after the hand valve (5).

7. The coal slurry preparation device according to claim 1, characterized in that: An outlet valve (6) is provided between the connection route between the low-pressure coal slurry pump (3) and the large coal slurry tank (9) and the outlet of the standby pump (4).

8. The coal slurry preparation device according to claim 1, characterized in that: The small coal slurry tank (2) and the low-pressure coal slurry pump (3), the low-pressure coal slurry pump (3) and the large coal slurry tank (9), the small coal slurry tank (2) and the standby pump (4), and the connection route between the low-pressure coal slurry pump (3) and the large coal slurry tank (9) and the standby pump (4) are all connected by pipelines.

9. The coal slurry preparation device according to claim 8, characterized in that: The outlet and inlet of the standby pump (4) are both provided with flanges (7), an elbow is provided between the inlet of the standby pump (4) and the small coal slurry tank (2), the inlet of the standby pump (4) is connected to the elbow, the elbow is connected to the small coal slurry tank (2) through a pipeline, and flanges (7) are provided at the connection between the elbow, the standby pump (4) and the pipeline.

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